On Wednesday 06 April 2022 21:31:18 Marek Behún wrote: > On Wed, 6 Apr 2022 11:39:34 +0200 > Pali Rohár <[email protected]> wrote: > > > U-Boot for Turris Omnia is always compiled with MMC, SCSI and USB support, > > so always enable macros for booting from these devices. > > This is not true. Attaching config where scsi is disabled. > > If we want to enforce MMC, SCSI and USB, we should add > select MMC > and others to Kconfig under TURRIS_OMNIA. But do we want to enfore > these? > > Marek
IIRC macro BOOT_TARGET_DEVICES just defines default values for ENV. So in default ENV would be macros for booting from SCSI, MMC and USB targets. Which means that if you call saveenv on U-Boot compiled with all these options and then replace U-Boot with the one without e.g. MMC support, it does not replace env variables for MMC booting. Anyway, does not defining e.g. SCSI booting env variables on U-Boot without SCSI support result in the same state as defining SCSI booting env variables on U-Boot with SCSI support with disconnected SCSI controllers or disks? In both cases there would be no SCSI suitable boot device.
